[mongocanfly]

first off welcome...
now for your body parts...

front fenders and grill for a 47-53 are different from the 54-55.1 (5bar grill vs bullnose grill)..

obviously the 47-53 windshield is different than 54-55.1 ( 2 piece windshield vs 1 piece windshield)...

the cabs 47-53 and 54-55.1 are different....(because of windshield)

and the bedsides are different 47-53 and 54-55.1 ( flat top vs angled bedsides)..

doors should interchange. ..

your 48 front sheetmetal as well as the 48 doors will fit the 54 cab..

there's lots of good reading here on the s10 swap..joedoh as well as skymangs and others have layed out the build process very well